GN: Add mojo_shell_tests, get more things working on android

third_party/zlib/BUILD.gn

Index: third_party/zlib/BUILD.gn
diff --git a/third_party/zlib/BUILD.gn b/third_party/zlib/BUILD.gn
index 323ff86e9bb121dd4a71df71912f778dea2ce836..9ac85a574fe53f7ef0e754d159909cdeb235b7f9 100644
--- a/third_party/zlib/BUILD.gn
+++ b/third_party/zlib/BUILD.gn
@@ -84,19 +84,17 @@ static_library("minizip") {
   direct_dependent_configs = [ ":zlib_config" ]
 }
 
-if (!is_android) {
-  static_library("zip") {
-    sources = [
-      "google/zip.cc",
-      "google/zip.h",
-      "google/zip_internal.cc",
-      "google/zip_internal.h",
-      "google/zip_reader.cc",
-      "google/zip_reader.h",
-    ]
-    deps = [
-      ":minizip",
-      "//base",
-    ]
-  }
+static_library("zip") {
+  sources = [
+    "google/zip.cc",
+    "google/zip.h",
+    "google/zip_internal.cc",
+    "google/zip_internal.h",
+    "google/zip_reader.cc",
+    "google/zip_reader.h",
+  ]
+  deps = [
+    ":minizip",
+    "//base",
+  ]
 }